tasks in a natural environment and be successful, and so modern life of course really impinges upon that. it is particularly acute, of course, for people who are doing shift work but ae also see it in things like jet lag where your biological clock may be messed up just for a few days, so i think the principles are trying to have temporal organization in your life. it is important to do the best that you can to consolidate sleep for a good six to seven hours. when it comes to eating, studies are showing us it is really best if you only eat during your active periods. for most of us that would be during the day and really try to cut out the nighttime or late night meals, and so giving yourself a little light during the active part of your life, making sure you consolidate sleep, getting your eating patterns to be coordinated with when you're active, those are the kind of things that will give you an edge in life. >> fascinating. thank you so much for sharing. we appreciate it. >> thanks, carol. >> we'll be right back. [ female announcer ] research suggests cell health plays a key rol